INGREDIENTS
•
2 to 3 tablespoons olive oil, plus more for greasing
•
8 ounces baby bella mushrooms, stems trimmed and caps halved
•
1 red onion, cut into 1/4-inch-thick rings
•
1 red bell pepper, cut into 1/4-inch-wide strips
•
1 zucchini, cut crosswise into 1/4-inch-thick slices
•
2 tablespoons red wine vinegar
•
1/2 teaspoon salt
•
1/4 teaspoon ground black pepper
•
1/4 teaspoon dried oregano
•
5 cloves garlic, finely chopped